Atomic Nucleus: The symbol for a certain isotope of polonium is 
Po. How many neutrons are there in the nucleus of this isotope?
A. 84
B. 130
C. 214
D. 298
E. 314
Answer: B
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What will be an ideal response?
By what factor is the capacitance of a metal sphere multiplied if its volume is tripled?
1.3 2.31/3 3.1 4.3-1/3 5.13
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Indicate whether the statement is true or false
Consider the ratio of the surface area of a sphere to its volume. What happens to this ratio if the diameter of the sphere increases by a factor of 3?
A. Decreases by a factor of 9 B. Increases by a factor of 3 C. Decreases by a factor of 3 D. Increases by a factor of 9 E. Stays the same